14.29$ transaction fee is absolutely not normal thing.
I have no idea what kind of plan they have about it.
But the possible reason is so many block chain transaction has been stuck for
so many days.
Maybe this is the only reason not to let any small transaction through bitcoin address.
The problem with online wallet like coinbase is that you can't set custom fee, that's why most people say/suggest to use wallets with private key control/export option. with segwit address/wallet (to another segwit address) you'd be paying even lesser fee now.